qsig.1p (7050B)
- '\" et
- .TH QSIG "1P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
- .\"
- .SH PROLOG
- This manual page is part of the POSIX Programmer's Manual.
- The Linux implementation of this interface may differ (consult
- the corresponding Linux manual page for details of Linux behavior),
- or the interface may not be implemented on Linux.
- .\"
- .SH NAME
- qsig
- \(em signal batch jobs
- .SH SYNOPSIS
- .LP
- .nf
- qsig \fB[\fR-s \fIsignal\fB] \fIjob_identifier\fR...
- .fi
- .SH DESCRIPTION
- To signal a batch job is to send a signal to the session leader of the
- batch job. A batch job is signaled by sending a request to the batch
- server that manages the batch job. The
- .IR qsig
- utility is a user-accessible batch client that requests the signaling
- of a batch job.
- .P
- The
- .IR qsig
- utility shall signal those batch jobs for which a batch
- .IR job_identifier
- is presented to the utility. The
- .IR qsig
- utility shall not signal any batch jobs whose batch
- .IR job_identifier s
- are not presented to the utility.
- .P
- The
- .IR qsig
- utility shall signal batch jobs in the order in which the corresponding
- batch
- .IR job_identifier s
- are presented to the utility. If the
- .IR qsig
- utility fails to process a batch
- .IR job_identifier
- successfully, the utility shall proceed to process the remaining batch
- .IR job_identifier s,
- if any.
- .P
- The
- .IR qsig
- utility shall signal batch jobs by sending a
- .IR "Signal Job Request"
- to the batch server that manages the batch job.
- .P
- For each successfully processed batch
- .IR job_identifier ,
- the
- .IR qsig
- utility shall have received a completion reply to each
- .IR "Signal Job Request"
- sent to a batch server at the time the utility exits.
- .SH OPTIONS
- The
- .IR qsig
- utility shall conform to the Base Definitions volume of POSIX.1\(hy2017,
- .IR "Section 12.2" ", " "Utility Syntax Guidelines".
- .P
- The following option shall be supported by the implementation:
- .IP "\fB\-s\ \fIsignal\fR" 10
- Define the signal to be sent to the batch job.
- .RS 10
- .P
- The
- .IR qsig
- utility shall accept a
- .IR signal
- option-argument that is either a symbolic signal name or an unsigned
- integer signal number (see the POSIX.1\(hy1990 standard, Section 3.3.1.1). The
- .IR qsig
- utility shall accept signal names for which the SIG prefix has been
- omitted.
- .P
- If the
- .IR signal
- option-argument is a signal name, the
- .IR qsig
- utility shall send that name.
- .P
- If the
- .IR signal
- option-argument is a number, the
- .IR qsig
- utility shall send the signal value represented by the number.
- .P
- If the
- .BR \-s
- option is not presented to the
- .IR qsig
- utility, the utility shall send the signal SIGTERM to each signaled
- batch job.
- .RE
- .SH OPERANDS
- The
- .IR qsig
- utility shall accept one or more operands that conform to the syntax
- for a batch
- .IR job_identifier
- (see
- .IR "Section 3.3.1" ", " "Batch Job Identifier").
- .SH STDIN
- Not used.
- .SH "INPUT FILES"
- None.
- .SH "ENVIRONMENT VARIABLES"
- The following environment variables shall affect the execution of
- .IR qsig :
- .IP "\fILANG\fP" 10
- Provide a default value for the internationalization variables that are
- unset or null. (See the Base Definitions volume of POSIX.1\(hy2017,
- .IR "Section 8.2" ", " "Internationalization Variables"
- the precedence of internationalization variables used to determine the
- values of locale categories.)
- .IP "\fILC_ALL\fP" 10
- If set to a non-empty string value, override the values of all the
- other internationalization variables.
- .IP "\fILC_CTYPE\fP" 10
- Determine the locale for the interpretation of sequences of bytes of
- text data as characters (for example, single-byte as opposed to
- multi-byte characters in arguments).
- .IP "\fILC_MESSAGES\fP" 10
- .br
- Determine the locale that should be used to affect the format and
- contents of diagnostic messages written to standard error.
- .IP "\fILOGNAME\fP" 10
- Determine the login name of the user.
- .SH "ASYNCHRONOUS EVENTS"
- Default.
- .SH STDOUT
- An implementation of the
- .IR qsig
- utility may write informative messages to standard output.
- .SH STDERR
- The standard error shall be used only for diagnostic messages.
- .SH "OUTPUT FILES"
- None.
- .SH "EXTENDED DESCRIPTION"
- None.
- .SH "EXIT STATUS"
- The following exit values shall be returned:
- .IP "\00" 6
- Successful completion.
- .IP >0 6
- An error occurred.
- .SH "CONSEQUENCES OF ERRORS"
- In addition to the default behavior, the
- .IR qsig
- utility shall not be required to write a diagnostic message to standard
- error when the error reply received from a batch server indicates that
- the batch
- .IR job_identifier
- does not exist on the server. Whether or not the
- .IR qsig
- utility waits to output the diagnostic message while attempting to
- locate the batch job on other servers is implementation-defined.
- .LP
- .IR "The following sections are informative."
- .SH "APPLICATION USAGE"
- None.
- .SH EXAMPLES
- None.
- .SH RATIONALE
- The
- .IR qsig
- utility allows users to signal batch jobs.
- .P
- A user may be unable to signal a batch job with the
- .IR kill
- utility of the operating system for a number of reasons. First, the
- process ID of the batch job may be unknown to the user. Second, the
- processes of the batch job may be on a remote node. However, by virtue
- of communication between batch nodes, the
- .IR qsig
- utility can arrange for the signaling of a process.
- .P
- Because a batch job that is not running cannot be signaled, and because
- the signal may not terminate the batch job, the
- .IR qsig
- utility is not a substitute for the
- .IR qdel
- utility.
- .P
- The options of the
- .IR qsig
- utility allow the user to specify the signal that is to be sent to the
- batch job.
- .P
- The
- .BR \-s
- option allows users to specify a signal by name or by number, and thus
- override the default signal. The POSIX.1\(hy1990 standard defines signals by both name and
- number.
- .P
- The
- .IR qsig
- utility is a new utility, \fIvis-a-vis\fP existing practice; it has
- been defined in this volume of POSIX.1\(hy2017 in response to user-perceived shortcomings in
- existing practice.
- .SH "FUTURE DIRECTIONS"
- The
- .IR qsig
- utility may be removed in a future version.
- .SH "SEE ALSO"
- .IR "Chapter 3" ", " "Batch Environment Services",
- .IR "\fIkill\fR\^",
- .IR "\fIqdel\fR\^"
- .P
- The Base Definitions volume of POSIX.1\(hy2017,
- .IR "Chapter 8" ", " "Environment Variables",
- .IR "Section 12.2" ", " "Utility Syntax Guidelines"
- .\"
- .SH COPYRIGHT
- Portions of this text are reprinted and reproduced in electronic form
- from IEEE Std 1003.1-2017, Standard for Information Technology
- -- Portable Operating System Interface (POSIX), The Open Group Base
- Specifications Issue 7, 2018 Edition,
- Copyright (C) 2018 by the Institute of
- Electrical and Electronics Engineers, Inc and The Open Group.
- In the event of any discrepancy between this version and the original IEEE and
- The Open Group Standard, the original IEEE and The Open Group Standard
- is the referee document. The original Standard can be obtained online at
- http://www.opengroup.org/unix/online.html .
- .PP
- Any typographical or formatting errors that appear
- in this page are most likely
- to have been introduced during the conversion of the source files to
- man page format. To report such errors, see
- https://www.kernel.org/doc/man-pages/reporting_bugs.html .